This is relevant at least for Ingenico connect ( the hostedCheckoutID ). We could also add the Paypal EC's Token to this field. Since paypal EC requires us to push through the payment after return, we may need to implement an orphan rectifier for that too.
|Open||None||T163947 Epic: Support and normalize multiple payment identifiers|
|Resolved||None||T165687 Add payment session ID to pending & donations queue messages|